Remove mentions of HTTP proxies from the README file

Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk>

README.md

@@ -2,7 +2,7 @@ OBS Proxy
 =========
 
 The OBS proxy can be used to link the [Open Build Service][] backend to
-workers behind a NAT or an HTTP proxy.
+workers behind a NAT or a firewall.
 
 The proxy is split in two parts, a client and a server. The server needs to
 run in the same network as the backend, while the client usually runs in the
@@ -10,9 +10,6 @@ same network as the worker. Each client can proxy connections for multiple
 workers.
 
 Currently not supported:
- * live log streaming: `/logfile` endpoint always returns 404. The complete
-   log is only available after the job has finished building.
- * HTTP/2 when using an HTTP proxy (a known issue in httpx)
  * Websockets connection over HTTP/2.
  * Better logging. Currently, a lot of tracing is being printed with no way
    to disable it.
@@ -27,7 +24,6 @@ Some individual files are licensed under different licenses, see copyright
 notices in those files for more details:
 
  * `async_jsonrpc.py`
- * `proxied_ws.py`
  * `rpcqueue.py`
 
 [Open Build Service]: https://openbuildservice.org/